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Isso – Open Source Alternative to Disqus

posativ.org Software & code Software projects Web & internet Candidate
Screenshot of posativ.org captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 4 calendar years, with breakout response in 2 of them.

submissions
4
submitters
4
observed span
2013–2017
peak thread · 67 comments
132 pts
latest 20+ return · 2017-02-21
132 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

SQLite backend Because comments are not Big Data. Yep, you got it. Also MIT licensed. Please go ahead and kill Facebook comments. I strongly dislike realname policies in this day and time where a single remark can cost you your job.

I noticed they use a Bloom Filter based on ip address to prevent people from voting multiple times. According to the implementation[1] it uses a 256-byte structure and limits the total number of votes on a post to 142 [2] (more than that and the false-positive rate > 0.001). This is stored as a sqlite BLOB on the same row as the comment. But if you're limiting votes to ~142 anyways, you can just store the exact ip address of…

Very nice! Thanks

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
248

reference only — not used in Hall rules or ranking

Total comments
96

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2013-10-31Show HN: Isso - a commenting server similar to Disqusposativ52
2015-01-27Isso – Open Source Alternative to DisqusFirst breakoutavinassh11027
2016-08-11Isso a commenting server similar to Disqusiocp_nox10
2017-02-21Isso: A Commenting Server Similar to DisqusBest thread · Latest 20+ point returnvmorgulis13267